Why did the Federalists urge ratification of the Constitution?

The Federalist urged the ratification of the Constitution because they believed that the United States would not survive unless this new plan of government was passed. One of their main beliefs was the need of a strong federal government; under the Articles of Confederation (the 1st plan of government) the national government was very weak.

The Federalist Papers were a series of 85 essays written by Alexander Hamilton, John Jay, and James Madison, where they analyzed the Constitution, and proved its capability to uphold a strong government. These papers caused an uproar, and a Constitutional Convention was held in 1786 to revise the Articles of Confederation, and create a new government.